 If you liked
Arslan Senki
|
 ...then you might like
Madou no Keifu
|
Both manga has a really good action component, with amazing drawings, enjoyable fights, intriguing settings.
But in both cases the focus is not on the fights or on the single protagonist, but rather on the world, on the psicologica evolution of the characters and on how they want to act to shape their future.
They are definitely an example of way in between a seinen and a shonen, with good art and deep characters